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Search: Posts Made By: ewmayer
Forum: Hardware 2021-07-29, 20:15
Replies: 32
Views: 2,570
Posted By ewmayer
Axn beat me to it - does his 300-some-GB estimate...

Axn beat me to it - does his 300-some-GB estimate jibe with what your system load app shows?

The 'pair%=95.65' means that out of every 10000 stage 2 primes, on average 9565 end up in bitmap pairs,...
Forum: Hardware 2021-07-24, 23:04
Replies: 32
Views: 2,570
Posted By ewmayer
@drkirby: I believe once you get beyond...

@drkirby:

I believe once you get beyond 500-1000 memory buffers in stage 2, you get rapidly diminishing returns, as the stage 2 prime-pairing percentage approaches 100%. Do your mprime logs list...
Forum: Hardware 2021-07-19, 19:53
Replies: 221
Views: 30,501
Posted By ewmayer
Ah, you must have a 64-core rig, not 68. What...

Ah, you must have a 64-core rig, not 68. What does 'sensors | grep Package' show? Here's output for mine:

Package id 0: +68.0°C (high = +80.0°C, crit = +90.0°C) ALARM (CRIT)

This system is...
Forum: Hardware 2021-07-19, 01:35
Replies: 221
Views: 30,501
Posted By ewmayer
I'd have to dig out the data I generated when...

I'd have to dig out the data I generated when first testing my KNL, but IIRC I got close to 100% || scaling up to 4-threads for current-wavefront FFTs, rapid ||-scaling deterioration above that...
Forum: Software 2021-07-18, 21:54
Replies: 50
Views: 1,666
Posted By ewmayer
One of my college thermodynamics professors used...

One of my college thermodynamics professors used the following example to illustrate some of the counterintuitive aspects of statistical thermodynamics. He was standing in front of a blackboard and...
Forum: Software 2021-07-18, 20:21
Replies: 50
Views: 1,666
Posted By ewmayer
I gave you a link to the original Crandall/Fagin...

I gave you a link to the original Crandall/Fagin DWT paper 2 full pages worth of posts ago. I suggest you cool the posting byterate and actually read it and work through the short-length examples it...
Forum: Software 2021-07-18, 04:36
Replies: 50
Views: 1,666
Posted By ewmayer
http://www.faginfamily.net/barry/Papers/Discrete%2...

http://www.faginfamily.net/barry/Papers/Discrete%20Weighted%20Transforms.pdf



IBDWT leverages the mathematical structure of the FFT (or suitably chosen NTT) to do an "implicit mod" modulo M(p)...
Forum: Mlucas 2021-07-06, 19:40
Replies: 46
Views: 4,784
Posted By ewmayer
Thanks, Teal - that's a very useful fiddle, I...

Thanks, Teal - that's a very useful fiddle, I will post a link to the so-hacked Loarer-script in a v19 patch alert to the README. It should be moot in a few weeks when v20 is up, but for folks not...
Forum: Mlucas 2021-07-05, 20:19
Replies: 46
Views: 4,784
Posted By ewmayer
Bug Alert: This bug will cause around 6% of...

Bug Alert: This bug will cause around 6% of completed results to not be successfully submitted to the server via the v5-APIified primenet.py script.

I first discovered the issue in March, around a...
Forum: Computer Science & Computational Number Theory 2021-07-02, 18:57
Replies: 80
Views: 29,279
Posted By ewmayer
Fermat-modmul with circularly shifted residues

I spent an appreciable amount of time last year wrestling with basic concepts and implementation-in-code of Fermat-mod squaring chains in the presence of residue shift. This proves rather more...
Forum: GpuOwl 2021-06-26, 19:34
Replies: 29
Views: 1,417
Posted By ewmayer
It means you don't need to do a thing - nonzero...

It means you don't need to do a thing - nonzero means p-1 will get done automatically before PRP.
Forum: Hardware 2021-06-22, 03:21
Replies: 221
Views: 30,501
Posted By ewmayer
After debug & test of the integrated GMP gcd code...

After debug & test of the integrated GMP gcd code over the weekend fired up one trial run p-1 run to bounds [b1,b2] = [1m,30m] on a known-factor case, to test the Mlucas v20 dev-code sure on a...
Forum: Mlucas 2021-06-21, 19:53
Replies: 46
Views: 4,784
Posted By ewmayer
Meaning you tried 'python primenet.py...

Meaning you tried 'python primenet.py --register'? What happened on doing that? That should prompt for your primenet login userid. I just tried it from a newly-created test directory on one of my...
Forum: Mlucas 2021-06-20, 20:54
Replies: 46
Views: 4,784
Posted By ewmayer
That 2nd error line is telling you what to do -...

That 2nd error line is telling you what to do - the first time you invoke the now-Primenet-API-enabled script, you need to do some basic registration via 'primenet.py with --register'. Try that, and...
Forum: Mlucas 2021-06-19, 20:37
Replies: 46
Views: 4,784
Posted By ewmayer
I refer you again to the README: "You must...

I refer you again to the README:

"You must be connected to the internet when you launch the script; once it has done its initial work-fetching you can be offline most of the time; the program will...
Forum: Mlucas 2021-06-18, 19:57
Replies: 46
Views: 4,784
Posted By ewmayer
As I noted in my earlier e-mail, see the "Get...

As I noted in my earlier e-mail, see the "Get exponents from Primenet" section of the README - it's linked in the Index at top of the page; please read it carefully, as it's your first go.

You'll...
Forum: Hardware 2021-06-13, 23:57
Replies: 221
Views: 30,501
Posted By ewmayer
@Paul - thx. NUMA-ness must be enabled by default...

@Paul - thx. NUMA-ness must be enabled by default in BIOS, because after installing the package, 'numactl -H' gives
[ewmayer@localhost ~]$ numactl -H
available: 2 nodes (0-1)
node 0 cpus: 0 1 2 3...
Forum: Hardware 2021-06-13, 22:59
Replies: 221
Views: 30,501
Posted By ewmayer
I have 2 good reasons for not using numactl: ...

I have 2 good reasons for not using numactl:

1. I don't know which mode is currently being set for MCDRAM, with regular RAM now installed, and found no related boot option;

2. 'numactl: command...
Forum: Hardware 2021-06-13, 22:18
Replies: 221
Views: 30,501
Posted By ewmayer
Quote from the above-linked Colfax page: ...

Quote from the above-linked Colfax page:

Again, though, I've not found a way to control the configuration mode, the only visible NUMA-related subitems in the SuperMicro boot menu are disabled, and...
Forum: Hardware 2021-06-13, 21:56
Replies: 221
Views: 30,501
Posted By ewmayer
@kriesel: Thx, but the Cray docs refer to a...

@kriesel: Thx, but the Cray docs refer to a particular KNL-node hardware configuration which they apparently used in some KNL-based supercomputers.


I revisited this similar tutorial from Colfax...
Forum: Hardware 2021-06-13, 00:56
Replies: 221
Views: 30,501
Posted By ewmayer
192GB RAM successfully installed and running...

192GB RAM successfully installed and running @2400MHz per the BIOS. But -

1. Runtime for my ongoing LL-DC on cpu 64-67 jumped from 22 ms/iter to 37 ms/iter. The per-iter times for the big F30 DC...
Forum: Hardware 2021-06-11, 20:42
Replies: 221
Views: 30,501
Posted By ewmayer
On typical GIMPS wavefront/DC work, I get good...

On typical GIMPS wavefront/DC work, I get good Mlucas scaling up to 4 threads (1 per each of 4 physical cores), rapidly diminishing returns beyond that. Large-FFTs get better scaling at high core...
Forum: Flea Market 2021-06-03, 00:20
Replies: 0
Views: 1,095
Posted By ewmayer
4 Port VGA KVM Switch for $0 + shipping cost

See here (https://www.amazon.com/Wireless-Keyboard-Connection-Switching-Function/dp/B071Y6C516/) for details. I used for several months to manage my desktop PC and 3 crunching micro-PCs, worked...
Forum: Hardware 2021-06-01, 21:57
Replies: 60
Views: 4,510
Posted By ewmayer
Not to promote further straying-off-topic -...

Not to promote further straying-off-topic - "money: whence it came, where it went" (h/t John K. Galbraith) discussions should be continued in Soap Box - but thinking of money solely or mostly in...
Forum: Hardware 2021-05-30, 20:09
Replies: 60
Views: 4,510
Posted By ewmayer
Bitcoin rival Chia 'destroyed' hard disc supply...

Bitcoin rival Chia 'destroyed' hard disc supply chains, says its boss (https://www.newscientist.com/article/2278696-bitcoin-rival-chia-destroyed-hard-disc-supply-chains-says-its-boss/)

Even if one...
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